Jhoulys Chacin pitched six strong innings and the visiting Colorado Rockies tallied just their fourth road win since May 1 with a 2-1 victory over the San Francisco Giants on Saturday.

Madison Bumgarner (2-7) kept the Giants close by giving up two runs – one earned – on seven hits with one walk and six strikeouts over seven innings. The Giants dropped to 3-9 in Bumgarner’s last 12 starts.

The Rockies took the lead in the fifth on Troy Tulowitzki’s RBI single to improve to 4-12 on the road since May 1 and move to 6-1 in Chacin’s last seven road starts.

Huston Street worked a perfect ninth inning for his 15th save.

The Giants’ lone run came on Cody Ross’ solo shot in the sixth inning off Chacin (6-4), who gave up four hits on three walks with two strikeouts.

Including Saturday’s contest, 47 of the Giants’ first 58 games have been decided by three runs or fewer, which leads the majors.